<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    for (let i = 0; i < 2; i++) { }
    console.log(i);	// i is not defined
  </script>
</body>
</html>